Miner&#39;s electric lamp.



A. TOLER.

NHNERS ELECTRIC L-AIVIP.

APPLICATION HLED APR. 24, 191.5.

Patented June 6, 1916,v

@WLM/Lusen UNITED r sTATEs PATENT oEEioE.-

ANGELO TOLER, OF BERWIND, COLORADO.

MINERs ELECTRIC LAMP.

To all 'whom' 'it m 0 2/ concern.'

.Be it known that I, ANGELO Tomte, tormerly a subject of the Emperor ot' Austria- Hungaryglbut having declared my intention to' become va citizen ofthe United States,.re

siding vat Berwind, count-y of Las Animas, and State of Colorado, have .invented certain new and useful Improvements in Miners Electric Lamps; and Ido declare the following to be a 1full, clear, and exact description of the invention,vsuch as'will enable others skilled in the art to which it appertains to make and use the same, reference being had to theaccompanying drawings, and to the 4characters of reference marked thereon;-

L which form a part of this specification.

My invention relates to improvements in electric lainps for miners use and of the class in which the lamp is detachably contery for sipplying the lamp is connected nected wij) the "miners cap, while tliebat- With'the ,faist belt.

i My object is to providev a construction of this class of such character that there shall be no possiblecha'nce for' a spa/rk which might ignite the coal gas'or dusjr within the mine. l' i In my improved construction, the lamp proper or incandescent bulb/ andits screw stem are mounted ina socket carriedbythe lamp frame, 1the filament .members of Athe lamp being respectively electrically connected with contacts concealed. within the `base of the fra-me means of a screw Vcover which closes the chamber in the base and is locked `against `removal except by lthe employment of aspecialkey. Hence, there .is no opportunityA fpr anexposed spark resulting from arcing at either contact with which the minervv himself cannot remove this cover,

the filament of thle lamp is connected. Even since" he is noty slpposed to have a-key which in detaiL-rcference being made to the acwill lunlock the same. The tWocontacts arranged\`within the base (if the lamp frame are respectively connected with electrical .conductors which lead to a battery v(not shown) it being 'assumed that. the battery is. carried-on the person of the user. A relatively sinall battery-Which may be easily .carried the 'person using the lamp, latter with current for a considerable nurnber' of hours. i

. Having briefly outlined my improved construction, I will proceed to describe the same speciiicau'miA f Letters raient.

by connecting it with' the belt of'. will I supply the' Patented June 1916.

Application filed April 24, 1915. Serial No. 23,745.

-companying drawing. in which is illustrated an embodiment thereof.

In this drawing. Figure 1 is a side elevation ot' the lamp shown in detail. Fig-2 lis a rear end view with the rear screw cover removed. being a vieudooking in the direction ot arrow 42, Fig. 23. lin. this view` the lamp is shown on a larger scale than'in I* 1g. 1. I* ig. 3. is a section taken on the line` .v3-3, Fig.

The same reference characters indicate the same parts in all the views.

liet the numeral 5 designate the lamp casing, which consists ot' a forward mem- .ber G and a rear member 7. vis relatively largo and is adapted to receive The member (i a reflector 8 whose inner extremity is apertured as shown at 9, to fit closely around theinsulation 12 of the socket 10, which is threaded to receive-the screw plug 18 of a relatively small incandescent lamp 14. The outer extremity 15 of the reiector is clamped between the inner face of the lens 16 and the 'forward extremity of the casing. The

holder 17 of the lens 16 is screwed upon the forward portion of the casing -as shown l.

. 1 The re r portion 7 of the casing is reduced in size .and is preferably cylindrical in shape, and is exteriorly threaded to receive Va screwcap 19, whose flange 20 is interiorly threaded to coperate with the threads of the casing member.` IVhen this cap is applied, a closed compartment 21 is formed, which is spaced from the forward compartment 22 in which the reflector is located', 'by a partition 2 3.' This partition is covered on its rear surface by insulating material 24, which is continuous with the insulation 12 surroundingfithe socket 10, and also with insulation 25 Which/covers `the interior surface of the rear portion 7 of the casing. lThe base 'of' the screw cap 19 is covered on the inside with a layer of insulating ma- -iterial 2G which, when the cap is screwed into is clamped between the base -19 and place,

the free edge of the member 7 of the casing.

Hence, the Walls of the chamber 21. are practically i covered with .insulating material.

The inner extremity ofthe socket 10 however,is expanded to formA a contact plate 27 With lwhich -a conductor 28 isconnected, as

shown at 295l This contact plate 27 is separated- Erom the. lamp casing by means of the insulating material With which the rear surface of they partition 23 is', covered. This fit the outer extremity of the screw.

in accordance with the regular Iconstr-uction of these lamps. This plate 30 isconnected' with the other conductor 35 as shown at 33.

.These tWo conductors 2Ey and 35 enteran opening 34 formed in thev front part 6 of the casing. 'After entering the casing compartment 22, these conductors pass through openings 36 and 37 formed in the partit-ion 23 and enter the rear compartment 21 of .the casing, Where they are connected with the contactvplates 27 and 30. Outside of the lamp casing, the opening 84 lregisters with the passage 38 of a exible, tube 39 composed ofl closely Wound spring Wire. This flexible tube protects ,the conductors .Where they pass through the opening ctand obvlates the possibility of injury to the insulating material as might be the case if they Were alloved to engage the rough edge of the casing as the position of the lamp is moved While in use. However, by the employment of this flexible tube, any exterior pull on the conductors in a lateral direction will bring them first in contact with the outer extremity of the tube, which .will pre-v vent the -Wearing engagement lwith the casing. l A l .Theflange 20 of the cap 19 is provided with a-threaded opening V4() which registers With a similar opening 41. formed in -the part 7 of the llamp casing, and the `cap is normally locked against turning .on the casing by means -of a screw 42, which is threaded into these openings. The outer extremity of' this screw is formed angular, preferably square in cross section'to fit a socket key 44 Whose inner'end is shaped `to After the cap is locked in place by the insertion of the screw, the cap cannot be unscrevved or removed except by the person who holds the key.. 4Thisis an important safety feature, since it Will prevent the possibility yof the opening of the' compartment 21 of the lamp casing under4 circumstances which might result inl the exposure of a spark at either ofthe contact plates 27' or 30.

The cap 19 of the lamp is provided with a hook l5 adapted'to beconnected `with the cap of the person usingl the lamp. The flange 2O of the screw' cap 19 is provided with asleeve 416' which extends outwardly l beyond the outer extremity@ of thescrew 40, far enoughto prevent'l tampering withl the. screw exceptv by the employment of a proper socket key. y

lFrom. the foregoing description, it will be understood vthat my improved lamp is yso constructed that it ,possesses the elements of safety'fo'r miners use, to a maximum de-l vree; v Any suitable portable battery may be employed inconnection With the lamp,'but as this battery is a stock article and no part of my invention, '1 vhave not' considered it I necessary toillustrate it in the drawing.

Having thus described my invention, What I claim is,-

v1. Ina miners electric .lamp comprising a lcasing havinga partition separating its chamber into front and rear compartments, contacts mounted on the partition and lo-v cated in the rear compartment, said contacts being insulated 'from each other and from the partition', the latter having an opening in which a socket is located to vreceive the lamp, the inner Aextremity 'of the socket x merging into one ofthe said contacts, an

incandescent lamp whose plug enters the lsocket and whose opposite electrodeengages the other contact, and closures applied to the opposite extremities of the casing, the forward .closure including a y transparent member. I

2. A miners lamp comprising a casing having a partition separating its chamberl into'front 'and rear compartments, the saidr partition having an opening, asocketvmo'unted in said opening but .insulatedfrorn the partition, a reflector-mounted in the front compartment and fitted aroundv thev said securing the reflector in place, the said closure including a lens, contacts mounted on the partition and' located .in the rear compartment,y electric conductors respectively connected ivith the said contacts andv passing through separate openings formed in the' partition, and al single. opening'- formed in the casing, an incandescent lamp inserted in the .said so'c'ketand Whose electrodes a're respectively electrically connected 'with the said contacts, and a-screw` cap or cover-applied to the rear extremity of thecasing forV 1005 socket, 'a closure for the front compartment- 

